Masters, Gilbert M., author
Prentice-Hall, 2008
Buku Teks
Henley, Ernest J., author
John Wiley & Sons, 1981
Buku Teks
Masters, Gilbert M., author
Prentice-Hall, 2008
Buku Teks
Greenkorn, R.A.
McGraw-Hill, 1972
Buku Teks
McPartland, Joseph F.
McGraw-Hill, 1996
Buku Referensi